NON-CONVENTIONAL SOURCES OF ENERGY JNTU previous years question papers

NON-CONVENTIONAL SOURCES OF ENERGY JNTU previous years question papers

 Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks

1. (a) Determine the altitude and azimuth angle at 3 pm (IST) on June 15, for Mumbai (latitude 180 54'N, longitude 720 49'E).
(b) For above location, determine the angle of incidence over a south facing surface with tilt angle of 150 with the horizontal.
(c) Also calculate the hour of the sunrise and the length of the day. [8+4+4]

2. Write short notes on:
(a) Selecting absorber coatings
(b) Materials for flat plate collectors
(c) Evacuated solar collectors [5+5+6]

3. (a) What are the various methods of storing solar energy.
(b) Discuss in detail any two of the solar energy storage methods. [4+12]

4. Determine the wind mill rotor diameter to operate a centrifugal pump, which will have a discharge of 40,000 litres/day with a total head of 10 m. The pump operates for 10 hours in a day. The rated speed of wind is 6 m/s. The power coefficient is 0.3. Density of air is 1.2Kg/m3. Assume transmission efficiency 95%, Pump efficiency as 35%. [16]

5. (a) What is biogas? How is it produced?
(b) Explain in detail about anaerobic digestion and the different phases and the processes involved in it? [6+10]

6. (a) What are liquid dominated hydrothermal convective systems? Write about them.
(b) With the help of a neat diagram, explain the working of a liquid dominated double flash steam system. [6+10]

7. (a) With reference to neat layout diagrams, explain the operation of a closed cycle OTEC plant.
(b) Find the quantity of water to be pumped to OTEC plant working with surface water at 27 C and with cold water at 8 C at a depth of 600 m from the surface to obtain 1.0 MW of thermal energy. Assume the density of ocean water as 1010 kg/m3 and the specific heat of water as 4200 J/kg K. [8+8]

8. Describe the operation of a thermionic converter. [16]

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